There are two series in home voltage regulator:servo-motor voltage regulator and relay type voltage regulator. a servo-motor type high accuracy household voltage stabilizer. Low power consumption, reliable work, high accuracy of stabilization,and good for use in regions where the net voltage is much fluctuating. Main Technical Data Phase no.: Single-phase Input voltage: 160V~250V Output voltage: 220V/110V± 2.5%(d5000VA With 110±2.5%£© Frequency: 50Hz/60Hz Adjustable time: 90% Ambient temperature: -10ºC ~+40ºC Relative humidity: